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TrendHip® Sistema de Vastago de Cadera
El concepto del diseño de TrendHip® combina las características tradicionales de un vástago de cadera recto, tronco cónico y totalmente recubierto en su superficie en la version no cementada.
El vastago autobloqueante rectangular asegura una posición primaria estable, con contacto directo con el hueso periprotésico de la secundaria por la superficie recubierta de hidroxiapatita.
Diseño sin cemento,
Las ranuras mediales y horizontales incrementan el área de contacto con el hueso y la estabilización del implante axial. La superficie de hidroxiapatita es una doble capa combinada de recubrimiento de titanio rugoso plasmaspray en la parte proximal del vástago con la disminución de espesor en el tercio medio, siendo liso el tramo distal
Diseño con cemento,
El vástago cementado autobloqueante Trendhip® es recto, rectangular y liso. Es tricónico y hecho de acero inoxidable liso. Está disponible tanto en version estándar como lateralizado (+6mm).
Componentes acetabulares,
Los vástagos de cadera TrendHip® están disponibles con cono 12/14 para cabezas modulares. TrendHip® se puede combinar con cabezas bipolares o implantes acetabulares sin cemento y cementados para la artroplastia total de cadera. Los sistemas acetabulares de Aesculap® Plasmacup® o Plasmafit® ofrecen una articulación de cabeza grande de 36 mm con componentes cerámicos Biolox® delta o Vitelene® (polietileno altamente entrecruzado con vitamina E).
Material
Los materiales utilizados para los implantes se especifican en los envases.:
Titanio forjado de aleación (Ti6l4V / ISO 5832-3)
Hidroxiapatita (ISO 13799-1)
El recubrimiento de Hidroxiapatita permite una alta fijación del implante al hueso al ser totalmente biocompatible, siendo un recubrimiento total de la superficie.
Trendhip®, estabilidad secundaria con el recubrimiento:
-Recubrimiento bicapa
-Preparación de la superficie (RA 2.75µm)
-Primera capa de titanio
-Proyección VPS
-Degradado en 3 zonas
-Capa de Hidroxiapatita
-Grosor constante: 100µm
-Proyección APS
La superficie de Hidroxiapatita es una capa doble combinada de un recubrimiento pulverizado de plasma de titanio puro en la parte del vástago proximal, con un grosor decreciente en el tercio medio del vástago y recubrimiento liso distalmente.